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Computer Tech
A+ Certification Questions
| Question | Answer |
|---|---|
| What is the i/o address for com1? | 3f8 |
| What is the i/o address for com2? | 2f8 |
| What is the i/o address for com3? | 3e8 |
| What is the i/o address for com4? | 2e8 |
| T OR F** Before sending data, a modem sends a request to send signal, or RTS. | True |
| ISDN uses _______________ technology. | only digital |
| A COM port is a _______ port. | serial |
| Modems use ________________ transmission. | asynchronous |
| CD-Roms *typically* hold ______ of data. | 650M |
| The terms "red book", "yellow book", and "orange book" refer to: | CD-Rom standards |
| CD-Roms are read by _________. | laser diodes |
| Which of the following can cause CDs to be misread? Select all that apply. smudges, fingerprints, scratches, cracks, slight melting | all of the above |
| In a computer with an eide adapter, where should you connect an ATA CD-Rom drive? | on the secondary ide |
| Your IDE CD-Rom drive is attached to the primary IDE adapter with your hard drive. How should its jumpers be set? | as slave |
| What does MSCDEX.EXE do? | It's a CD-Rom DOS driver |
| A CD-Rom drive always uses IRQ: | depends on the adapter it's attached to |
| T OR F** If a computer's bios allows it, you can boot from a CD-Rom. | True |
| A single speed CD-Rom drive transfers data at: | 150 KBs per second |
| Your CD-Rom audio cable connects to the: | sound card (or motherboard if sound is integrated with it) |
| Whenever you have a hardware resource conflict, it will more likely be an IRQ conflict rather than an i/o conflict because: | there are alot more i/o addresses than IRQs. |
| T OR F** SCSI adapters usually don't need drivers, just the devices that interface with them. | False |
| T OR F** Most SCSI-2 devices will work fine with SCSI-1 adapters. | True |
| How many devices can connect to the typical SCSI adapter? Assume it has only one data connector. | 7 |
| How many devices can be used on a single SCSI bus? Keep in mind that the SCSI host adapter counts as a device. | 8 |
| What is the jumper setting on a SCSI device to configure it to use the fourth SCSI id? Remember, SCSI ids start with zero. | 011 |
| Which type of interface provides for the fastest data transfer? IDE, SCSI, parallel, serial or ISA | SCSI |
| T OR F** In addition to i/o port addresses, SCSI adapters also use a range of rom addresses for their onboard bios. | True |
| SCSI-2 cables have how many pins? | 50 |
| IDE cables have how many pins? | 40 |
| You are about to install a second IDE hard drive in a PC that has only one IDE adapter. Your first hard drive will still be the boot drive. How should the second drive be configured? | as a slave |
| What is the maximum number of IDE drives that EIDE will support? | 4 |
| On a flat data cable, a red or blue stripe means: | pin 1 |
| Most PCs give a single beep on bootup to indicate they are ok hardware wise. You boot your PC and don't get a beep. What should you check first? | speaker |
| A sound card typically uses which IRQ? | 5 |
| Your IDE hard drive is not spinning up when you turn on the PC. What is the most likely problem. | loose molex connector |
| I once had a PC with no video. I replaced the system board, CPU, and video card, and still had no video. I then replaced the IDE cable and fixed the problem. Am I telling the truth? | Yes! |
| T OR F** A virus can mimick just about any hardware symptoms you can think of. | True |
| A static jolt of as little of ____ volts can fry most any PC integrated circuit. | 30 |
| A human cannot feel a static discharge as high as ____ volts. | 200 |
| ESD is ___________. | electrostatic discharge |
| What's the best way to prevent damaging your PC with static electricity? | wear an ESD wrist strap |
| What is EMI? | electromagnetic interference |
| You're on your PC at midnight and an electric storm pops up. What's the best way to protect your PC. | unplug the PC and remove phone line from the modem |
| When referring to hard drives, HDI stands for: | head-to-disk interference |
| You should never put floppy drives, hard drives, or even VCR tapes or cassette tapes on top of speakers (or near any other source of magnetism) because of: | EMI |
| Static electricity thrives in which type of environment? | cold and dry |
| What's the best way to protect your hard drive data? | regular backups |
| A CRT's grid voltage can be as high as: | 15,000 volts |
| A monitor's CRT (cathode ray tube) can pack quite a wallop of a charge even if it's been turned off for several days or more. Before you service a monitor, you must discharge the CRT using a tool specific for that purpose. Before you do the discharge, wha | make sure the monitor is unplugged |
| Which component stores an electrical charge? | capacitor |
| On PC power supplies, the wire attached to pin one is usually: | white or orange |
| If the voltage on pin 1 of the power supply is not in the range of ______ volts, the PC will not boot. | 2.5 - 5 |
| The output voltages of a PC power supply are in the form of _____ current. | DC |
| A spike is a sharp and sudden rise in voltage. It's duration is usually measured in: | milliseconds |
| Resistance is measured in units of: | ohms |
| Current is measured in units of: | amps |
| Capacitance is measured in units of: | farads |
| Voltage is measured: | in parallel |
| Resistance is measured: | after breaking the circuit |
| Current is measured: | only when you turn the device off first, then connect your meter to the device in series, then turning it back on |
| Anti-static plastic bags are: | conductive |
| POST stands for: | power on self test |
| POST is done when the PC is: | first turned on or reset |
| The POST routine, which counts system board ram first, is stored in: | rom bios |
| A 1xx (x can be any digit) POST error code indicates a problem with the: | system board |
| A 2xx POST error code indicates a problem with: | ram or rom |
| A 3xx POST error code indicates a problem with: | keyboard |
| A 4xx, 5xx, or 24xx POST error code indicates a problem with: | video adapter |
| A 17xx indicates a problem | hard drive or controller |
| A 6xx indicates a problem with the: | floppy drive |
| A parity error usually indicates a problem with: | memory |
| How many bits in a byte? | 8 |
| Type one PC cards: | are the thinnest PC cards |
| The floppy drive uses which DMA (direct memory access) channel? | 2 |
| You do a DIR on a diskette, remove it and insert another, and get the same DIR listing from the first diskette. This is known as a "phantom" directory, and it is caused by: | line 34 on the floppy is bad or deffective floppy drive |
| The power connector on a floppy drive is called a: | berg connector |
| The print from a dotmatrix printer is light and uneven. This is most likely caused by: | worn ribbon |
| The print from a dotmatrix printer is sometimes light, sometimes dark. This is most likely caused by: | paper not advancing properly |
| On a dot-matrix printer, regular lube maintainence should be followed, but this component should never be lubed: | printhead |
| When you move a mouse, the mouse pointer is positioned via: | pulses of light |
| Your laser printer is on, you hear the fan running, but it won't print. What is the first thing you should check? | that the printer is online |
| In laser printing, there are six steps the printer follows. What comes between the conditioning phase and the developing phase? | writing phase |
| During the laser printer's conditioning phase a uniform charge of _______ is placed on the photosensitive drum. | -600 volts |
| Your laser printer gives you an error code 50. This is usually caused by a defective: | fuser assembly |
| Laser printer toner is composed primarily of: | particals of plastic resin and iron oxide (rust) |
| Select the best choice for cleaning laser toner from clothing: | clean cloth with cool water |
| During the fusing process, toner is: | melted into the paper |
| On the PC side, the printer port is a: | 25 pin female parallel connector |
| ISA is a ___ bit technology. | 8/16 |
| T OR F** You can have EISA and MCA devices in the same PC. | False |
| T OR F** You can place an ISA device in an EISA slot. | True |
| You can only place an MCA device in an MCA slot. | True |
| What is the first CPU to include an internal math coprocessor? | 486DX |
| You plug a power supply's connectors onto the system board. You know you did it correctly because: | the two sets of black wires are together in the middle |
| Before upgrading your operating system, you should first: | backup your hard drive |
| What DOS program can you run to see which serial ports are detected? | MSD |
| Where would you load the mouse driver mouse.sys? | config.sys |
| Where would you place mouse.com or mouse.bat? | autoexec.bat |
| What is a TSR? | terminate and stay resident program |
| Where are most TSRs loaded? | autoexec.bat |
| Where is the "FILES=" statement placed? | in config.sys |
| Where is the "BUFFERS=" statement placed? | in config.sys |
| T OR F** Himem.sys must be loaded before loading emm386.exe. | True |
| T OR F** You can run Windows 3.1 or 3.11 without loading himem.sys. | True |
| T OR F** You must have himem.sys loaded before you can load DOS high. | True |
| When DOS is loaded high it is placed in the HMA (high memory area). This is located: | anywhere in expanded memory |
| To load DOS high you must place a statement in config.sys. It is: | dos=high |
| The reason you load DOS high is to: | free up more expanded memory |
| The upper memory area is located: | between 640k and 1024k |
| Extended memory is: | anything above 1024k |
| Extended memory is managed by: | himem.sys |
| Expanded memory is: | paged memory |
| Expanded memory is managed by: | emm386.exe |
| Conventional memory is: | anything below 1024k |
| By default, DOS will load where? | conventional memory |
| UMBs, or upper memory blocks are located where? | between 640k and 1024k |
| What statement in config.sys will allow DOS access to unused UMBs? | DOS=UMB |
| What DOS command shows which TSRs are loaded? | TSR-SHOW |
| The DIR command shows a single directory listing. What switch is required to show the subdirectories inside the directory where you typed the DIR command? | /s |
| You wish to see the hidden files in a directory and you type | Yes |
| What two DOS commands lets you know the presence of hidden files? | chkdsk and dir |
| What are the two hidden DOS system files? | io.sys & msdos.sys |
| In CMOS setup, if you enable Rom Bios Shadowing, what happens? | a copy of the bios is placed in ram |
| What does XMS refer to? | extended memory |
| What does EMS refer to? | expanded memory |
| Virtual memory is composed of ram and: | a swap file |
| Memory that is paged out to the hard drive is known as: | virtual memory |
| What device driver must be loaded in config.sys to enable power management on a laptop computer? | power.exe |
| As you soon as you see DOS starting, what key do you press to bypass the startup files? | F5 |
| As soon as you see DOS starting, what key do you press to step through the startup files? | F8 |
| Which command makes a file read only? | attrib +r "filename" |
| Which file displays the DOS prompt? | command.com |
| "Loadhigh" or "LH" is used to load TSRs into upper memory. Where is this statement used? | autoexec.bat |
| Which file contains the DOS kernel? | io.sys |
| A cluster is the minimum file allocation unit. A cluster is composed of: | sectors |
| What command is used to partition a hard drive? | fdisk |
| What is the largest partition size that DOS supports? | 2.1 Gig |
| What command displays a disk's volume label? | vol |
| What command changes or adds a volume label? | label |
| Windows 3.1 no longer supports which mode that Windows 3.0 supported? | real |
| Win.com supports a number of switches to force Windows to start in the mode selected. You enter win.com /s at the DOS prompt. How is Windows started? | standard mode |
| The Windows file system.ini contains primarily: | Windows system settings and device drivers |
| What is a PIF? | program information file |
| 9 bit SIMMs have how many pins? | 30 |
| What is the maximum length for a parallel cable? | 15ft |
| What IRQ does the real time clock use? | 8 |
| What form of software can also be called firmware? | system BIOS |
| After you install a floppy drive and restart the system, the floppy drive light stays on constantly and you get an "FDD Controller Failure" POST error. What is the problem? | floppy cable is backwards |
| What type of port communicates information to a peripheral device one bit at a time? | serial port |
| Should you wear a grounding strap when servicing a CRT monitor? | No |
| If your monitor just shows dots when you turn it on, what is most likely the problem? | bad video RAM |
| You have two hard drives installed on your primary EIDE controller. You install a CD-ROM on your second EIDE controller. What jumper setting would you use for the CD-ROM? | Master |
| What factor determines the amount of RAM a CPU can control? | width of the address bus |
| The correct AT command to tell a modem to hang up is? | ATH |
| The AT command to tell a modem to dial a number is? | ATD (number to dial) |
| locations in memory are referred to as? | addresses |
| What is the IDE CMOS/BIOS limit for the size of a hard drive? | 504MB |
| You can probably determine that a monitor is working, even though it is not connected to a PC, by performing what action? | turn up the brightness to see if the raster appears |
| What purpose does the ROM serve? | starts the system when the computer is turned on |
| What is the difference between SRAM and DRAM? | SRAM has built in switches and does not have to be refreshed |
| What type of printers are considered impact printers? | Dot Matrix & Daisey Wheel |
| How does a Pentium Pro processor differ from a Pentium processor? | Pentium Pro has a onboard L2 cache |
| What is the binary equivalent of decimal 3? | 011 |
| In order for a device to communicate with the CPU it must have? | an I/O address |
| CD ROM is Secondary master or Primary slave? | Secondary Master |
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